, do they talk about that at all? when the former presidents talk, mostly we learn nothing because those are off the record communications. but boy, you would love to know if they exchange any notes or historical reflections or observations. but it's a big historic event and we will find out in bits and pieces after about the interaction between the presidents themselves. >> it would be interesting to see what if anything happens, because there will be representatives, high ranking officials from iran, for example, attending the memorial service, presumably the funeral on sunday as well. and these kinds of diplomatic awkward moments potentially could be significant. >> sometimes awkward moments, sometimes either the front of the cameras or away from the cameras, a chance for somebody even in a very brief conversation, maybe, to start a relationship or to continue or advance a relationship, or let's just say, the president raul castro, if the president of the united states wanted to change a relationship, he could do i